Some work on unfying actions on different sources.

post/main.go

@@ -0,0 +1,37 @@
+package post
+
+import (
+	"fmt"
+	"syscall"
+)
+
+type UnifiedPost interface {
+	ID() string
+	Name() string
+	Author() string
+	Comment() string
+	Tags() []string
+	Files() []string
+	URL() string
+	Stringer() string
+	Type() string
+}
+
+// WriteAttributes writes info from post to file's metadata
+func WriteAttributes(filename string, post UnifiedPost) (err error) {
+	var tags string
+	for _, tag := range post.Tags() {
+		tags = fmt.Sprintf("%s,%s", tags, tag)
+	}
+	err = syscall.Setxattr(filename, "user.xdg.tags", []byte(tags), 0)
+	if err != nil {
+		err = fmt.Errorf("WriteAttributes: %s", err.Error())
+		return
+	}
+	err = syscall.Setxattr(filename, "user.xdg.comment", []byte(post.Comment()), 0)
+	if err != nil {
+		err = fmt.Errorf("WriteAttributes: %s", err.Error())
+		return
+	}
+	return
+}